Pulp-screening machine.



O. WANDEL.

PULP SCREENING MACHINE.

APPLIOATION FILED 111111.11, 1912.

1,036,389.. Patented Aug. 2o, 1912.l

\ l ,I l O i/O Qn@ Q E f i ticularly `pear from the gear which is rus rar MANUFACTURING COMPANY,

A CORPORATON OF MASSACHUSETTS.

PULP-SCREENING MACHINE Speeication of Letters Patent. Application led March 11, 1912. Serial No. 683,141.

Patented Aug. 20, 1912.

To all whom t may concern.' v Be it known that LVO'rro 'WANDEL, of Walpole, in the county State of Massachusetts, have inventedl certain new and useful-improvements in Pulp- Screening Machines, of which the following is a specification, reference being had to the accompanying drawings, thereof.

This invention has referenceto improvements in pulp screening machines in which a cylindrical screen is rotatably mounted on a vibratory arm or frame and is caused to rotate in a tank containing pulp and water in order to gather said pulp and to carry the same around with the screen while such vibratory action of said arm or frame tends to loosen portions of the pulp so that pulpy particles of comparatively small dimensions pass through the interstices of thescreen. he presenty invention relates more parto a pulp screening machine having a single cylindrical screen and one of the objects of the invention is to improve the construction of the vibratory arm or frame on vwhich the screen is carried and the means for limiting and cushioning the ret'rac'tive movement of said arm or 'frame together with the means for effecting the 'vibration of said arm or frame.

Other objects of the invention will apollowing description.

The invention consists in sch novel leatures of. construction and combination of 'arts as shall hereinafter be more fully described and pointed out in the claims.

Figure 1. represents an end elevation of portions of a pulp screening machine illustrating the present invention. Fig. 2. represents an enlarged detail view of portions of the same partially broken away and shown in section.

Similar numbers of reference designate corresponding parts throughout.

As shown in the drawings 5 indicates one of a pair of end frames of similar construction between which is supported the tank 6. O11 this frame 5 is mounted the member 7 having bearings in which is journaled the shaft 8 having the worm 9. and the miter driven from the similar gear12 of the main shaft l1 journaled in bearings of tl'iesupplemental ramel and having the throw cams as 14.

At onel end of frames as 5 are mounted of Norfolk and .having the enlargement or to receive and support the buier 18 of rubforming part i 20 the end of the thrust screw brackets as 15and at the' other end, adjacent the location of shaft 11 are fixed the vertical buffer-supports or spindles as 16 head 17 adapted ber or other elastic material which buier ,carries the anvil block 19,

Pivotally mounted on the brackets as 15 are frames or arms as 20 having bearings as 21 and reduced ends as 22 adjacent to which said arms 20 have vertically disposed bores or chambers as 23 located in registry with the heads 17 of spindles `16 and of a size to receive said heads and the buffers 1-8 and anvil blocks 19 supported by said spindles. In the wall of said chambers 23 are formed air vent perforations as 24 and the upper ends of said chambers are screw threaded to receive plugs as 2.5 having screw 'threaded bores in'which are adjustably screwed the thrust screws as 26 having lock-nuts as 27. On the reduced portions 22 of arm 21 are mounted the cam blocks as 28 in position to be intermittently acted on by the throws or steps of the cams -as I4 during-the rotation of such cams. Y

Journaled in the bearings 21 of the arms or frames as 20 is the cylindrical screen 29 of any well'known construction and having the worm gear 30.which `is driven by the worm 9 of the shaft 8 to effect the rotation of the screen 29 while the cams as 14 act on the cam blocks as 2810 vibrate said arms or frames as -20 and to thus effect the shaking of portions of the pulp material through the screen. On the reactive movement of arm 26 strikes the anvil block 19 and the force of such blow is cushioned by the rubber buffer 18 which acts ultimately to limit the downward movement of the arm or frame 20.

By this construction the rubber buffer 18 is protected from contact with oil, the screw 26 may be adjusted to vary return movement of arm 2O and it the buffer 18 becomes worn plug 25 can be removed by unscrewmg the same and anvil block'19 and buffer *.18 c-an be taken out from the upper end of chamber 23, a new buffer may be Athen inserted in said chamber23 and the block 19 placed thereon, and plug can then be screwed into place. This' change is preferably made when the block 28 is resting on the cam 14.

Having thus described my invention I 1. In a pulp screening machine of the nature described, the combination Wit-h the frame, a horizontal screen itsustainli'gf arm pivotally mounted thereon "and h'avlng al bore or chamber, and a thrust pin extending into said bore or chamber, of a spindle mounted on the frame and extending into said bore or chamber, and a yielding buffer device carried by said spindle,

42. In a pulp screening machine of the nature described, the combination Withthe frame, a shaft journaled therein, a throw cam on seid shaft, e spindle fixed on said cam, substantially as frame adjacent said cam, and a buder carried by said spindle, of ascreen carrying arm pivotaly mounted on said frame and having a vertical bore adapted to receive said buer, a screw plug secured in the upper end of said bore and having a screw threaded perforation, a thrust screw ad- 'justably mounted in said perforation, and a cam block mounted on the free end of said arm and adapted to be acted upon by said described.

OTTO WANDEL. Witnesses:

M. M. EINES,

W. M. PAINE. 

